Pump.



J. M. STRATTON.

PUMP.

APPLICATION FILED APR. 1. 1918.

Patented Mar. 11. 1919'.

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J. M. STRAITON/ PUMP.

APPLICATION FILED APR. 1. I9l8.

Patented Mali 11,1919.

fig. l v

ama l/M. r if I UNITED STATES A JAMES M. STRATTON, OF SALEM, OHIO, ASSIC-NOR TO THE DEMING COMPANY, OF SALEM,

01110, A CORPORATION or 01110.

PUMP.

Specification of Letters Patent. Patented Blur, 11, 1919.

Applicationfiled April 1918. Serial No. 225.892.

To all whom it may concern:

Be it known that- I, J AMES M. S'rnx'i'ron, residing at Salem. in the county of Columbiana and State of Ohio, have invented a certain new and useful Improvement in Pumps. of which the following is a full, clear, and exact description. reference being had to the accompanying drawings.

This invention relates to pumps adapted for use with tanks into which water is forced by the puhip against air compressed therein and furnishing the pressure for forcing the water to the point of use. Frequently due to leakage in the tank or connections, such air becomes exhausted or so reduced in volume that sufficient-pressure can not be obtained or that. the use of a very small amount of water results in exhausting the pressure. To avoid tliistlitiiculty it is necessary to introduce small quantities of air. preferably continuously, while the pump is operating to compensate for the loss.

It is the object of the present invention to avoid the above dilticulty and supply sufficient air in the most desired manner by the use of-a very simple. inexpensive device not liable to get out of order, capable .of very easy adjustment and automatic in its opera tion.

My invention is hereinafter more fully described in connection with the accompanying drawings illustrating a preferred embodiment of'tlie same. Additional advantages will become apparent in the following description. The essential characteristics are summarized in the claims.

- In the drawings. Figure 1 is a verti *al sectional view through a force pump embodying my invention; F ig. :2 is an enlarged axial section through the pistonconstructed in accordance with this invention; Fig. 3 is a sectional end elevation of the piston on the line 3 3 of Fig. '2; Fig. i is an end elevation of the piston looking in the same direction as Fig. 3: Fig. 5 is a detail of the piston valve removed; Fig. (3 is a sectional end elevation of the end of the piston opposite that shown'in Fig. 4.

Describing the parts by the use of reference characters, 1 indicates a suitable base supporting a casing :2. formed,.to comprise the suction chambers and cylinder of the pump and 3 is a casing mounted on the firstmentioncd casing-and forming the discharge chamber and having a suitable enlargement .3- forniingthe air chamber. The cylinder 10 is a tubular member integral with the casing 2 and supported by separated partitions 11 and 12, .while the cylinder is open at each end and provided with a suitable noncorrosive lining 15. (3 indicates the inlet opening connected with the supply line through which water may pass between the supporting partitions 11' to the valve chamber 7 formed in the base 1. v

Mounted on the lower portion of the casing 2 are valve seats lfi cot' perating with .valves comprising body .members having guides 17 loosely movable through the seats and connected with ontWaiKlly-I extending disk-like flanges 18 beneath which (firemesilient washers l9 fitting the upper portions of the seats. These valves as illustrated are seated by gravity although it is to beiinder--' stood that they may be operated by springs in any well known manner desired. These inlet valves control the passage of water from the chamber 7 to the suction chambers 20 and'21 at each end of the casing and in open communication with the ends of the cylinder 10.

At the upper portion of the SiKft-ibii cliilih bers 20 and 21 are provided discharge valves of a construction similar to the inlet valves.

there being suitable valve seats 'tlfiough which pro ect the valve guides "37 rigid with the overhanging flange 28 while resilient washers :29 carried by the valve fit between the flanges 28 and the upper surface of the valve seats. Water passing from the suction chambers through the valve seat openings'under the control of the discharge valves enters the discharge chamber 24 and air chamber 25 and passes outwardly through the discharge opening 30, connected with the tank or receptacle (not shown.) supplied by the pump.

Operating in the cylinder 10 is suitable piston reciprt-icated by the piston'rod 32 having a threaded portion 2.}3 engaging in ternal threads in a body mcinber'35. This body member is provided with an enlarged head portion at the end adjacent the piston rod which is surrounded by the usual resilient packing in the form of'a Shirt 36, having an inwardly turned portion 37 clamped between the inner shoulder of the head and a ring The body member 35 has a reduced extension externally. threaded, as at 39 receiving a spider like cap having an incation of the e e d is A N e u he. i r preieisoly or me same illlmsuil a heel of the body member Wherecv inner end forms a shoulder adapied to Cl iii-p inwardly 'turuec"; portion 0'1"- resilient skirt &6 eurned in the opposite direction from the skirt 3%, It will be seen that this acts to clamp both pecking members mid remiu them in position. The ring 38 is slighiily smaller in diameter shun the lute rior of the cylimler "whereby the co M the pisses with the cylinder is c firely by me resilient members 36 Extending longitudinally through she piston body is a smell passage 50, SdbSiJf ZIP- tielly parallel with she axis and 0 Jen at eech end of the body member. Eli; me end toward the spider cap Chis opening is shown as provided with inwardly beveled portion adspteo to form a seat for e conical valve having a long rigid stem ex'bencliug substantially through the passage mul being sufiiciently suuiller than the passage to leave an opening around the stem and permit a small amount of Water pass when the Valve is opened. is desirable to use e loci: nut 56 on threads 35 set tightly against the piston body member and to prevent this out closing or partial closing the passage 50, provide on enlur co. cavity 57 as this curl of 'ihepision body into which this passage opens,

The pump shown and described is a double acting force pump, the water being drawn into one suction chemher consequent upon the movement of the piston away from that chamber and forced lrom that cluimher through iris discharge vulve consequent upon the movement oi'fizhe pisioo toward the chamber,

At 60 is indicated a pipe connection threaded imo the heacl of the chamber 21, and threeclecl thereto is shown :1. check valve chamber 61 receiving the threaded end of a.

pet cock body 63 forming a seac for a hall stopper 6%. 65 (lesignuics athumb piece for operating the pet, cocl: plug. These parts form a passage leadingto u suction charm ber aiul controlled by a check valve and a manually adjustable vulva.

The operation of my invention may be briefly descr bed as follows: l pon reciproliir waiter llfiWll into and forced from the chambers 20 and 21 in substentiz ii the normal 11321117191, Each more nient o'fi iihc piston away from the chamber 21 draws a small immune of air through the valves 63 and 64;. the pet cock plug being" set so that it opcuml but very slightly. Air thus drawn, into the chamber passes \i ougl the opeuiiig 50 from the chainipc chamber 221, but upon the move men; of the piston toward the chamber '21 valve closes preventing passage of "Water or air the opposite direction. Accordingly sir accumulates in the chamber 21 Water pumped "from Hie opposite chamber 20 through tiiepistou displaces such air raising the pressure in the chmnher 21 and forcing the air therein out through the discherge valve; Thus eventhoughsirsccumulates in the chamber 21 is may not stop the pumping of Water thereihrough as would be the case were the piston passage and valve not used. Experience has demonstrated that Without a clerics for pumping a small amount of woier from one side of the piston the other, air may accumulate in the suction chamber 21 and remain there. merely expanding and contracting with the move men-e of the piston. and preventing pumping of therethrough.

The spider e2 limiis the opening movement of she valve '52 while the long slain 5-1 of this valve reciprocaiing in the passage on each stroke of the piston keeps this passage free from foreign particles and prevents clogging of the same. This spider being 'threerled to ihe piston body provides for its convenient removal allowing access to the valve 52.

In the foregoingdescription, it will be that l have provided a very simple, inexpensive device for accomplishing the objects out Furthermore. the construction of "the piston en'ibodying this device is very simple and effective, ihe body porr-ion of the piston carrying a head forming an internal support -for the packing skirt 36, keeping-it distended and in contact with the lining of the cylinder, While the threaded ring: 44 of zhe spider cap forms e similar support for the flexible skirt liming thus described my invention. What I claim is 1. In a force pump, the combination of a cylinder, a casing having" chambers in comn'umicultion with each curl of the cylinder, an air inlet to one" of said chambers, :1 piston reciprocating l'll said cylinder, :1 single passage through suicl piston, adapted to permit the escape of an appreciable amount of air or Very small amount of Water, and a freely opening valve in said passage closing during movement of ihe piston in the direction toward said air inlet.

' 2. in ii force pump, the combination of a casing having a cylinder therein and combined suction and force chambers in open communication with each end of the cylinder and than the cylinder, a piston in the cylinder, inlet and discharge valves f0}:

piston being otherwis said chambers, an air inlet to one of said -ha nbers, a passage through the piston concylinder, a casing havihgxchambers in com-- numicationwith eacl end of the cylinder, a piston in said cylin ler, a small passage through said piston, adapted to permit. the passage of only asmall amount of jwater, and an air inlet passage leading to one of said .-h-ambers.

4. In a force pump, the combination of a casing having a cylinder therein and a suction chamber in open communication with the cylinder. a piston in the cylinder, inlet and discharge valves for the suction chamber. a passage through the piston, a valve in said passage closing on the movement of the piston toward the chamber, an air inlet passage leading to said chamber. and a check valve in said passage.

5. In a pump, the combination of a casing. a cylinder therein. a chamber in communication with the cylinder, a'piston in said cylinder. a small relief passage through the piston, a valve closing said passage consequent upon the movement of the piston toward the chamber. an air inlet passage leai'ling to said ch unber. and an adjustable valve in said passage.

6. The combination in a force pump, of a casing. a cylinder therein, a suction chamber in communication with the cylinder, a piston in said cylinder, a passage through the piston. a valve for closing said passage during movement of the piston toward the, chamber. an air inlet passage leading to said cl'iamber. a check valve. and an adjustable valve in said passage.

7. .t force pump having a cylinder and a piston thereof. and adapted to present Water to each side of the piston. a suction chamber with, a valved inlet and in communication with the piston at one side thereof, having inlet and discharge valves, and a port through the piston. and means for closing said port when the piston is moving toward the chamber, means for admitting a small amount of air into the chamber upon the suction movement of the piston.

8. In cylinder, a chamber in communication therea valved outlet for said chamber, an air inlet passageway to said chamber, a piston in said cylinder, a passage through said piston, a valve for closing said passage during the movement of the piston toward said chamber.

9. The combinatlon of a cylinder, a chamher in communication therewith, a valved inlet to said chamber, a valved outlet from said chamber, a piston in said cylinder having a passage through it. an air passage independent of the piston to said chamber, and a check valve in said air passage.

10. The combination of a cylinder, chambers respectively in (COITllIllllilttltiOll with the opposite ends of the cylinder. said chambers having inlet and outlet valves, a piston reciprocating in said cylinder, a passage through said piston. an air inlet into one of said chambers, and a check valve in the inlet passageway.

11. The combination of a cylinder, chambers in communication with the opposite ends of the cylinder. a piston reciprm'atiug in the cylinder, a passage. through the pis ton, a valve in said passage closing in one.

direction oi, the movement and opening in the other. an air inlet passag way independent of the piston t the chamber with which said valve controls commimication, and a check valve in the inlet passageway.

In testimony \vhereor- I hereunto aliix my signature.

JAMES M. STRATTON.

a force pump, the combination of a 

